Kel Tec Sub 2000 Gen 2 Replacement Front Sight Pivot Block Stainless steel front sight pivot block redesigned and machined to tighter tolerances to remove the excessive front sight post movement on the Generation 2 Sub 2000. 75% improvement is possible. The original sight housing, sight post, sight post plunger, pivot screw, and all springs are reused. Comes with assembly instructions. Satisfaction guaranteed.